Saturating fibrous material.



JESSE A. DUBBS, OF PITTSBURG, PENNSYLVANIA.

SATURATING FIBROUS MATERIAL.

Specification of Letters Patent.

Patented Aug. 6, 1907.

Application filed October 27, 1906. serial No, 340,801.

To all whom it may concern:

Be it known that I, Jesse A. DUBss, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, a citizen of the United States, have invented or discovered certain new and useful Improvements in Satur'ating Fibrous Material, of which improvements the following is a specification.

, Great difi'culty is experienced in saturating fibrous material, such as the covering of electric wires etc., with insulating material. This difficulty is increased when the wire with its fibrous covering is incorporated in electrical machinery, as motors, generators, etc. It is the present practice to form the parts of the generators, etc., before the covered wire has been saturated,

and then to place such parts in a tank containing asphaltum which is heated to render it fluid. The liquid asphaltum with the articles immersed therein are subjected to pressure to cause the penetration of the asphaltum to the interior portions of the article. This method is defective as it is found that the saturation is not complete, probably on account of the lack I the insuring of a thorough saturation of porous or fibrous substances as brick or wood, the covering of electric wires, etc., with a preservative or insulating material.

The invention described herein consists generally in the addition to the saturating material as asphaltum, of a diluent which will not have any injurious effect on the material or the article tobe insulated, and is capable of being removed or eliminated by a process of distillation from the saturatingmaterial, while the articles are immersed therein.

In the practice of my invention the material with which the fibrous material is to be saturated, such for example as asphaltum; is diluted and rendered quite -fiuid by adding theretosome material which will not The compound is placed in a receptacle such as will permit its being subjected to pressure andthe articles to be treated are placed therein. The charge in the receptacle is then heated and subjected to pressure. After suflicient time has elapsed to permit thorough saturation, pressure in the receptacle is redueed but the temperature is maintained or raised sufficiently to vaporize the diluent which should have a lower vaporizing temperature than the asphaltum. This treatment is continued until all or practically all the diluent has been eliminated leaving a plastic or liquid material when the articles are removed from the plastic or liquid treating material.

Under these conditions the elimination of the diluent is uniform through the compound, the portion which has been incorporated with the article treated using its portion of the diluent as readily as and uniformly with other portions of the compound. The volatilized diluent may be caused to pass through a condensing apparatus and the liquid thus recovered may be used again to dilute the asphaltum.

I claim herein as my invention:

1. As an improvement in the art of saturating fibrous material, the method herein described which consists in adding a diluent to the saturating material, immersing the article to be saturated in the compound thusformed eliminating the diluent while the article is immersed in the compound and removing the article while the material to be applied is in plastic condition.

2. As an improvement in the art of saturating the fibrous covering of wires with asphaltum, the method here in described, which consists in adding a diluent to the asphaltum, immersing the fiber covered wire in the compound, eliminating the diluent while the wire is immersed in the plastic compound.

3 As an improvement in the art of saturating the fibrous covering of wire with asphaltum, the method herein described which consists in diluting the asphaltum with a liquid volatilizable at a lower temperature than the asphaltumimmersing the fiber covered wire in the compound, subjecting the compound while the wire is immersed therein, to a temperature at which the diluent willvolatilize and removing the saturated article while the saturating materialvls in a plastic condition.

In testimony whereof, I havehereunto set my hand.

JESSE A; DUBBS.

Witnesses:

Cmsnss BARNETT, WILLIAM H. -WILSON. 

